Box with cover



Jan. 14, 1958 F. LARsEN 2,819,813

Box WITH covER Filed April 2e, 195e Huang BOX WITH COVER Fritz P. Larsen, Paris, France Application April 26, 1956, Serial No. 580,815

1 Claim. (Cl. 220-43) The present invention relates to boxes comprising two main separable components, namely a container or body adapted to receive material, and a cover or closure removably mounted over said container.

An object of the invention is to provide a box of this type which can be opened using one hand only.

Another object of the invention is to provide a box of this type which can be opened without soiling the hand with the contents of the box and without bending the edges of the latter.

These results and others are obtained according to a feature of the invention by providing a pressure disc entrapped within the skirt of the resilient cover and which may be depressed by a nger through a central aperture of the cover.

Other objects and advantages of the invention will be apparent to those skilled in the art, from a consideration of the following description of some specic embodiments of the invention, shown by way of examples, in the accompanying drawings, in which:

Fig. l illustrates one form of box with cover according to the invention in diametrical sectional view, the box being shown under closed condition,

Fig. 2 is a similar view showing the cover lifted from the box, and

Fig. 3 shows a modification.

Referring iirst to Figs. 1 and 2, the box or body is indicated as at l and is made of a rigid material, for instance plastic such as polystyrene. Though it is not necessary, the upstanding wall of the body is shown as formed with a shoulder 2 so that the lower portion of this wall is made thicker than the upper portion thereof.

The cover is made of two distinct parts, namely: a closure 3 and a pressure disc 4.

The closure 3 is made of a resilient material, for instance plastic such as polyethylene and is formed with a skirt the bottom portion of which is adapted frictionally to embrace the bottom portion of the upstanding` wall of the box 1.

Formed on the inner face of the skirt of the closure 3 and extending inwardly is an annular bead 5.

The pressure disc 4 also is made of a rigid material which may be the same as the box is made of, if it is desired. It is formed with an elevated central portion or button 6 adapted to protrude upwardly through a corresponding central aperture 7 provided in the closure 3. The diameter of said aperture is slightly greater than that of the button so that the latter may freely move axially therethrough.

As may be seen in the drawing, the diameter of the pressure disc 4 is intermediate between the inner diameter of the skirt of the closure 3 and the inner diameter of the annular bead 5. in this manner, the

r"ice pressure disc 4 may freely slide axially within the skirt of thel closure between the flat portion thereof and the plane of the annular bead 5. Owing to the resilient character of the closure, it will be understood that the pressure disc may be easily driven home into the skirt of the closure. However, when set in place, the pressure disc is entrapped within the closure by virtue of the inwardly directed bead 5 retaining it in assembly with the closure when they are removed from the body 1.

It will be noted that, since the various parts of the assembly are dimensioned as hereinabove indicated, the pressure disc is capable of resting upon the upper edge extremity of the upstanding wall of the body.

Though it is not necessary, the closure is shown as formed with a further annular rib 8 directed downwardly from the under face of the flat portion thereof, in the vicinity of its periphery. Due to the resilient character of the material the closure is made of, this bead 8 acts as a seal for the box.

The box is shown under closed condition in Fig. 1. If it is desired to open it, it is suilicient to depress the button 6, for instance by a gentle pressure of the tip of the forefnger while the closure is held between the thumb and the middle finger of the same hand. The closure is thus lifted relative to the body and is completely released from the latter as soon as the skirt no longer engages the bottom portion of the upstanding wall of the body, as shown in Fig. 2.

Such a structure is so eliicient that mere blowing upon the button is capable of opening the box.

Fig. 3 shows a modification in which the bottom portion of the skirt of the closure is formed with an inwardly directed bead 9 adapted frictionally to engage the outer face of the upstanding wall of the box in order to provide for a seal. In this embodiment, some clearance may be left between closure and box otherwise than at said bead. In every embodiment, the annular beads of the resilient cover contribute in forming a seal for the box.

As many changes could be made in the above con'- struction, and many widely different embodiments of this invention could be made without departing from the scope of the claim, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim is:

A box assembly comprising in combination: a body of rigid plastic material formed with a flat bottom portion and an upstanding peripheral wall with an upper edge extremity; a closure of resilient plastic material formed with a iiat portion and a depending skirt with an inner diameter whereby said skirt is adapted frictionally to engage the outside of said upstanding peripheral wall of said body, said closure having a central aperture; and a rigid pressure disc of a diameter larger than that of the upper edge extremity of said upstanding wall of said body and smaller than the inner diameter of said skirt in order to be capable of resting upon said upper edge extremity and of freely moving axially within said skirt, said skirt being formed with an annular inwardly directed bead spaced from said at portion of said closure and the inner diameter of which is smaller than the diameter of said pressure disc, said pressure disc being entrapped between said annular bead and said tiat portion of said closure, whereby the box may be opened by a pressure being exerted downwardly against said pressure dise by a finger inserted through said aperture of `.-.-'.Y"V-I r gf@ :n.:wm .gfw v 4 saidclosure,the inner...face ofvthaanporonif said Referencesitedlnthe le of this patent closure including a peripheral resilient bead adapted to UNITED STATES PATENTS bear against the top face of said pressure disc, the skirt of said closure including a further annular bead formed 776206 Smelker Nov 29 1904 upon the inner face of said skirt near the mouth thereof, 5 FOREIGN PATENTS the skirt of said c1osure-frictionally engaging said up- 297,626 Italy June 16, 1932 standing wall of said body through said further annular 606,558 Great Britain Aug. 17, 1948 bead. 1,089,718 France Oct. 6, 1954 

